Dear Aspirant,

Smile designing is associated with Aesthetic Dentistry. So you have to look upon the institutes which offers Aesthetic Dentistry program. There is no fixed duration of this course. It depends upon from which Institute you are pursuing this course. Some Institute offers this course for 10 days, 30 days or few months.

So approximately we can say maximum 2-3 months duration is required for you to complete the course

Hope this helps